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图像去噪算法研究

摘 要

图像是一种重要的信息源，通过图像处理可以帮助人们了解信息的内涵。数字图像噪声去除涉及光学系统、微电子技术、计算机科学、数学分析等领域，是一门综合性很强的边缘科学，如今其理论体系已十分完善，且其实践应用很广泛，在医学、军事、艺术、农业等都有广泛且成熟的应用。MATLAB是一种高效的工程计算语言，在数值计算、数据处理、图像处理、神经网络、小波分析等方面都有广泛的应用。MATLAB是一种向量语言，它非常适合于进行图像处理。

本文概述了小波阈值去噪的基本原理。对常用的几种阈值去噪方法进行了分析比较和仿真实现。最后结合理论分析和实验结果，讨论了一个完整去噪算法中影响去噪性能的各种因素。为实际的图像处理中，小波阈值去噪法的选择和改进提供了数据参考和依据。

关键字：小波变换；图像去噪；阈值；MATLAB

Abstract

Image is one kind of important information source, may the connotation. The digital image de-noise involves domains and so on optical system, microelectronic technology, computer science，mathematical analysis, it’s a very comprehensive interdisciplinary science, now its practice application is very widespread. In the medicine, the military, art, the agriculture and all . MATLAB is one kind of language, in aspects and so on value computation, data processing, imagery processing, neural network, wavelet analysis all .

This article done comparing experiments using several good threshold denoising methods. Finally according to the theory analysis and simulation results, the paper discusses several kinds of factors which affect the denoising capability in a complete denoising algorithm. That provides the date reference of threshold denoising methods in actual image process. MATLAB

Keywords: Wavelet transformation; Image denoising; Wavelet threshold;